BZ-2RLT Equivalent & Substitute Parts Reference

Part Overview

The BZ-2RLT is an active-status snap action switch manufactured by Honeywell Sensing and Productivity Solutions. This SPDT (Single Pole Double Throw) chassis mount switch is rated for 15A AC at 125V and 500mA DC at 125V, with lever/leaf actuator configuration and screw terminal termination. The switch operates across -55°C to 85°C with 20,000,000 mechanical life cycles. Finding equivalent substitute parts is necessary to ensure supply chain flexibility, manage inventory optimization, and maintain design compatibility across manufacturing batches and procurement cycles.

Substiute Parts

BZ-2RLT

Honeywell Sensing and Productivity SolutionsIn Stock: 935BZ-2RLT Datasheet

Current PartRFQ

Z-15GL-B

Omron Automation and SafetyIn Stock: 921Z-15GL-B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BZ-2RLT is determined by strict alignment of critical electrical and mechanical parameters. The following parameters must match or exceed the main part specifications:

Mandatory Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-Mom
• AC current rating: minimum 15A
• AC voltage rating: minimum 125V
• Actuator type: Lever, Leaf
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Operating force: 141gf
• Release force: 14gf

Allowable Variance Parameters:

• Operating position: ±0.010" tolerance acceptable
• Differential travel: ±0.005" tolerance acceptable
• Overtravel: ±0.010" tolerance acceptable
• Operating temperature range: may be narrower than -55°C to 85°C
• Mechanical life: may be lower than 20,000,000 cycles
• DC current and voltage ratings: may differ if AC ratings are met

The Z-15GL-B from Omron Automation and Safety qualifies as a substitute based on matching circuit, function, AC ratings, actuator type, mounting, and termination specifications within acceptable mechanical tolerances.

Parameter Comparison

Engineering Selection Recommendations

BZ-2RLT (Honeywell) Selection Criteria:

• Primary choice for applications requiring extended operating temperature range (-55°C to 85°C)
• Required for designs demanding 20,000,000 mechanical life cycles
• Specified when DC voltage rating of 125V is mandatory
• Active product status with established supply chain

Z-15GL-B (Omron) Selection Criteria:

• Acceptable substitute for applications operating within -25°C to 80°C temperature range
• Suitable for designs tolerating 10,000,000 mechanical life cycle specification
• Compatible with applications where DC voltage requirement does not exceed 30V
• Active product status with ROHS3 compliance and REACH affected designation
• Provides IP00 ingress protection specification

Both parts maintain RoHS compliance and identical ECCN/HTSUS classifications, supporting regulatory consistency. Selection between these parts depends on specific application temperature extremes, mechanical cycle requirements, and DC voltage demands.

Frequently Asked Questions (FAQ)

Q: Can Z-15GL-B replace BZ-2RLT in all applications?

A: No. Z-15GL-B is a substitute only for applications where operating temperature remains within -25°C to 80°C and mechanical life requirement does not exceed 10,000,000 cycles. Applications requiring -55°C operation or 20,000,000 cycle life must use BZ-2RLT.

Q: What is the significance of the operating position difference (0.689" vs 0.685")?

A: The 0.004" difference falls within standard mechanical tolerance for snap action switches. Both parts are mechanically compatible in chassis mount applications with standard clearance specifications.

Q: Does the Z-15GL-B DC voltage rating of 30V limit substitution?

A: Yes, if the application circuit requires DC voltage operation above 30V. The BZ-2RLT supports 125V DC. For AC-only applications, this parameter is not a limiting factor.

Q: Are both parts RoHS compliant?

A: Yes. BZ-2RLT is RoHS Compliant; Z-15GL-B is ROHS3 Compliant. Both meet current RoHS requirements. Z-15GL-B additionally carries REACH Affected designation.

Q: What does the 141gf operating force mean for substitution?

A: Both parts require identical 141gf operating force, ensuring consistent actuator feel and mechanical response. This parameter must match exactly for functional equivalence.

Q: Can I use Z-15GL-B if my application operates at -50°C?

A: No. Z-15GL-B minimum operating temperature is -25°C. Applications requiring -50°C operation must use BZ-2RLT, which operates to -55°C.

Q: What is the difference between mechanical life and electrical life?

A: Mechanical life (20,000,000 cycles for BZ-2RLT; 10,000,000 for Z-15GL-B) measures physical actuator durability. Electrical life (500,000 cycles for Z-15GL-B) measures contact reliability under electrical load. BZ-2RLT does not specify electrical life.

Q: Are screw terminals identical between both parts?

A: Yes. Both parts use screw terminal termination style, ensuring identical wiring and installation procedures in chassis mount configurations.